My two reunion cents, if you please:
Although I've never been one to feel the foundations of reality and all that is sacred shaking at each line-up change, it would be too foolish (even for me) not to admit Portnoy's return is pretty huge news, as was Portnoy's departure years and albums ago. Yet I can already see a dialectical trap opening its ugly maw beneath the fanbase, tempting us to enclose DT's opus into distinct output quality tiers dictated by the MP-In and MP-Out switch. I find the trend (which I could be very well imagining, but I doubt that) cosmically unfair towards Dream Theater and even crueler towards Michael Mangini and Michael Portnoy.
Let me try to explain using my totally subjective and lunatic opinions about DT's output during the years, which I had the privilege to witness in its entirety:
I consider the Images to Six Degrees stretch as DT's best 5 albums streak, and I refuse to think I have to thank MP for it; I also happen to consider the Train to Clouds stretch as the worst* DT's 4 album streak, and I refuse to think I have to blame MP for it.
* (In Dream Theater case, "worst" is the word common mortals should use meaning "less than mindblowing" because - let's be focking fair once in a while - the guys' level of musical craft, knowledge and mastery won't let them make a "bad" album in the musical context they live. Everything is and is always been skewed by our insane love and expectations. I don't like the Octavarium album very much, but I can't say it's a bad album with a straight face)
But wait!
I consider the Turn to Astonishing stretch as DT's best 3 album streak, and I refuse to think I have to thank MM (or MP's absence) for it; I also happen to consider the last two albums as DT's *worst 2 album streak, and I refuse to think I have to blame MM (or MP's absence) for it.
Now, I'm not saying The Mikes are ineffectual and interchangeable forces. When Portnoy left I was a bit scared because I knew we were losing a creative force of Roger Waters magnitude, something simply nobody else on the scene could provide in the same package with the required technical chops. Yet the band kept its creative spark, or found a new one, and Mangini (who is no Portnoy in that aspect) has undeniably contributed to the process.
Where does all of this tripe leave me about The Reunion?
For me it's quite simple (or simplistic, you choose): every DT album contains an impetus, a strong aesthetic choice to dive on a different path, if not a state of the art statement at least a need to grow as composers. The albums I like travel on a path I like, those I don't ... don't. The last two albums were different: I couldn't feel said impetus (right, wrong, good, or bad). For the first time there was no active theater, but a stationary picture gallery. The band needed a spark. Again, it was no Mangini's blame and it won't be all thanks to Portnoy if/when things turn, but a change of such magnitude can easily led to new impetus.
So, reunion good, but never on polarising and cult of personality terms, as far as this moron is concerned.
Another thing: I am not worried about Mangini's "dismissal" in the slightest. Yes, we can only assume, but past record should provide a shiteload of credit: the band have always behaved princely on the human relationships and values field. Everyone who has complained about James (the only member who - given age, instrument and repertoire is performing focking miracles) should be very aware of the fact. Unless proof dictates the opposite, I believe that everyone has acted with honour and grace.